Dienelactone Hydrolase from Pseudomonas Cepacia

Overview

Journal J Bacteriol

Publisher American Society for Microbiology

Specialty Microbiology

Date 1993 May 1

PMID 7684040

Citations 12

Authors

M Schlomann

K L Ngai

L N ORNSTON

H J Knackmuss

Affiliations

Soon will be listed here.

Abstract

Dienelactone hydrolases have previously been shown to play a crucial role in chlorocatechol degradation via the modified ortho cleavage pathway. Recently, the enzymes induced in 4-fluorobenzoate-utilizing bacteria have been classified into three groups on the basis of their specificity towards cis- and trans-dienelactone. The dienelactone hydrolase and the 3-oxoadipate enol-lactone hydrolase from Pseudomonas cepacia have now been purified to apparent homogeneity and characterized with respect to molecular mass and amino acid composition. The dienelactone hydrolase has a distinct preference for cis-dienelactone and did not convert the trans isomer or muconolactone, 3-oxoadipate enol-lactone, or 4-fluoromuconolactone to a significant extent. In properties like amino acid composition, pH optimum of activity, and lack of inhibition by p-chloromercuribenzoate, the P. cepacia dienelactone hydrolase differed substantially from 3-oxoadipate enol-lactone hydrolases and other dienelactone hydrolases.

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